Static stress drop inferred from near-fault parameters for the 1999 Chi-Chi earthquake in Taiwan

► We use waveform modeling to examine the source parameters of the Chi-Chi earthquake. ► We obtain the static stress drop is almost identical to the dynamic stress drop. ► The fault motion is mostly spent releasing seismic wave energy during the rupture. ► The energy-moment ratio in the north of the fault is higher than that in the south.